Our job in Homework 2 was to create an Image using Radiance and to also create an Inventor app of a sphere with a simple emittance function (cos). Well, I think that's what it was. Anyway, that's what I did. The Sphere rotates and updates its surface colors to simulate a cosine emittance distribution.
As for the radiance image... well, I created a token image but that's all I had time for. I'd rather be creating images using my software anyways.